Diamond and Related Materials, Год журнала: 2024, Номер unknown, С. 111863 - 111863
Опубликована: Дек. 1, 2024
Язык: Английский
Communications in Theoretical Physics, Год журнала: 2024, Номер 76(6), С. 065701 - 065701
Опубликована: Апрель 7, 2024
Abstract This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating temperature, can achieve multi-band within 30–45 THz range or spanning 30–130 THz, rate exceeding 0.9. Furthermore, structural parameters of are optimized using particle swarm optimization (PSO) algorithm ensure optimal response. The response is primarily attributed coupling guided-mode resonance local surface plasmon effects. film’s symmetric structure enables polarization incoherence allows for tuning through various means such as doping/voltage, temperature parameters. In case a response, exhibits good sensitivity refractive index changes in multiple modes. Additionally, spectrum remains effective even at large incidence angles, making it highly promising applications fields biosensing infrared stealth.
Язык: Английский
Процитировано
108
Small Structures, Год журнала: 2024, Номер 5(6)
Опубликована: Апрель 3, 2024
Quasibound states in the continuum (BIC) have earned extensive attentions due to capability realize extremely high quality‐factor ( Q ‐factor) resonance. Here, a metamaterial composed of silicon dioxide (SiO 2 ) with low refractive index (≈1.45) on gold (Au) reflection mirror is proposed narrowband perfect absorption assistance quasi‐BIC and surface lattice The SiO ‐Au absorber based two tilted cubes into unit cell periodically arranged Au mirror. By optimizing geometry parameters, presents both accidental symmetry‐protected modes near‐perfect absorptivity ‐factor 2330 1438, respectively. can be further improved 10 4 by increasing thickness micrometer level. Meanwhile, wavelength peak shows linear sensitivity 16.67 17.88 nm per degree incident angles as higher than 92% 75% spectra range 215.0–141.0 nm, These results open avenue for emitter, imaging, biosensing applications.
Язык: Английский
Процитировано
13
Results in Physics, Год журнала: 2024, Номер 63, С. 107861 - 107861
Опубликована: Июль 3, 2024
This study presents and demonstrates a design of micro-electro-mechanical system (MEMS) reconfigurable terahertz (THz) metamaterial absorber (TMA) that shows tunable free spectra range with maximum value as 166 GHz in transverse magnetic mode switchable resonance from 1.24 THz to 1.53 THz. The unit structure TMA consists two movable rectangular resonators aside an x-shaped resonator at the center comprising c-shaped connected upside down. material configuration is typical metal–insulator-metal sandwich configuration. That bottom Au layer preventing penetration wave, dielectric SiO2 accommodate absorb incident patterned array select resonant frequency. electromagnetic response could be flexibly modulated when reconfigured by changing gaps between based on MEMS platform. Meanwhile, owing asymmetry structure, tuned single-, dual-, triple- quad-resonances varying polarization state incidence. Furthermore, sensitivity explored demonstrated remarkable linearity under variation surrounding environment refractive index 1.0 2.0. feasibility validated experimental absorption are well meet simulation results. above results indicate proposed possesses great potential applications multiple switches, highly efficient environmental sensors.
Язык: Английский
Процитировано
11
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(34), С. 45771 - 45777
Опубликована: Авг. 20, 2024
The terahertz (THz) metamaterials integrated with microelectromechanical systems (MEMS) have led to the realization of dynamic control in amplitude, phase, polarization, and spin angular momentum THz wave. In this study, we demonstrate an MEMS-based reconfigurable metamaterial (RTM) composed a split ring resonator (SRR) for real-time modulation By gradually increasing polarization angle incident wave, resonant frequency SRR switches from 0.74 1.16 THz, maximum depth is more than 70%. When RTM actuated by different DC bias voltages, polarization-dependent transmission intensity device can be actively tuned. shows logical function characteristics that used logic modulators performing driving voltages states as 2-bit input signals quantizing response "on" "off" states. gates "NAND" are at 0.439 "AND" 0.732 THz. These results offer potential applications proposed tunable filters, optical switches, programmable modulators, so on.
Язык: Английский
Процитировано
9
Sensing and Bio-Sensing Research, Год журнала: 2024, Номер 45, С. 100676 - 100676
Опубликована: Июль 27, 2024
An infrared (IR) tunable perfect meta-absorber (TPM) is presented, which configured of metal-insulator-metal (MIM) structure. The unit cell the TPM device composed two opposite T-shaped and rod-shaped Au resonators on reflective mirror layer. optimized feature size can achieve absorption resonant wavelength be tuned from blue-shift first then red-shift by increasing gap between continuously. tuning process red shift linear. By changing distance resonators, exhibits linearly. Moreover, shows polarization-dependent characteristic that main resonance attenuated 100% to 0% polarization angle 0° 90° incident IR light. has an excellent linear relationship with ambient refractive index, sensitivity maximum figure merit (FOM) are calculated as 1249 nm/RIU 21 RIU−1, respectively. These results prove design proposed very suitable for use sensing, switching, index sensing applications.
Язык: Английский
Процитировано
6
Journal of Materials Chemistry C, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
A broadband polarization conversion metasurface (PCM) for anomalous reflection and beam deflection with switchable characteristics.
Язык: Английский
Процитировано
6
Applied Materials Today, Год журнала: 2024, Номер 41, С. 102455 - 102455
Опубликована: Окт. 5, 2024
Язык: Английский
Процитировано
6
Materials Today Communications, Год журнала: 2025, Номер unknown, С. 111685 - 111685
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Materials Science and Engineering B, Год журнала: 2025, Номер 315, С. 118128 - 118128
Опубликована: Фев. 17, 2025
Язык: Английский
Процитировано
0
Advanced Optical Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 26, 2025
Abstract In this study, a phase of metasurface is proposed based on rotational ring configuration, whose tuning principle associated with its conversion between spin angular and orbital momentum. The focusing vortex beams could be obtained steerable focal plane. spin‐selection mechanisms shifting process depend the corresponding momentums. To promote practical application, relationships mechanical performance, i.e., limited circumvolution angle optical properties including range length momentum are analyzed discussed, indicating that demand implementation would lower by increasing converted sparse aperture then demonstrated as an effective solution to implement involved high This work will pave way for designing tunable facilitating their applications in areas manipulation vortex‐based communication.
Язык: Английский
Процитировано
0